South Korea has its northern border with (unsurprisingly) North Korea. It faces China to the west across the West Sea (Yellow Sea), and Japan to the east across the East Sea (Sea of Japan). The line dividing the south from the north runs roughly along the 38th parallel. South Korea is a little bit bigger than Portugal, and most of the country, particularly the east coast, is covered in mountains - the highest is Hallasan at 1950m (6396ft).
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